Princess Mary’s mother, Queen Mary, amassed an important collection of objects by Fabergé, the Russian jewelers, who devised this small nephrite bowl around 1900. Wrapping the neck of the squat vessel is a silver-gilt cord set with diamonds and finished by a cabochon ruby and sapphire.

Estimate: $19,000–$29,000

Photo courtesy of Christie’s London

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A prisoner from one of the Napoleonic wars created this straw-work tabletop chest in either the late-18th or early-19th century. It was given to Princess Mary as a Christmas gift in 1934.

Estimate: $960–$1,440

Photo courtesy of Christie’s London

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Princess Mary’s brother George, the dashing Duke of Kent (1902–42), was a discriminating connoisseur and collector, who filled his houses with choice antiques. Among them was this George III candelabra, comprising ormolu, tortoiseshell, and blue john, a rare and highly decorative variety of feldspar. It was part of a Matthew Boulton garniture set created in 1771 for Princess Mary’s ancestor, Queen Charlotte of the United Kingdom. The Lascelles acquired the piece in 1947, when George’s young widow, Marina, strapped for cash after her husband’s death in a plane crash during World War II, auctioned many personal possessions in order to pay estate taxes.

Estimate: $320,000–$481,000

Photo courtesy of Christie’s London

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Princess Mary’s first son, George Lascelles, seventh Earl of Harewood, purchased this Jean Hugo painting, Paysage avec des arbes, from the French artist in 1963.

Estimate: $12,000–$18,000

Photo courtesy of Christie’s London

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Crafted by Thomas Chippendale around 1770, these two open armchairs, composed of painted and parcel-gilt wood, were part of a suite of furniture designed for the music room at Harewood House. The furnishing of the house, then owned by Edwin Lascelles, first Baron of Harewood, proved to be the biggest commission of Chippendale’s career. Originally green, the chairs were painted white in the early 1850s, at which time they were also reupholstered in the striped fabric shown here.

Estimate: $320,000–$481,000

Photo courtesy of Christie’s London

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This circa-1919 Danish silver hot-water pitcher was a Christmas present to Mary’s husband, Henry Lascelles, the sixth Earl of Harewood, from his parents-in-law, King George V and Queen Mary. The teatime essential bears a coroneted monogram—the interlaced L’s refer to Harewood’s title at the time, Viscount Lascelles—and the inscription G.R.I. and M.R. XMAS 1922.

Estimate: $800–$1,120

Photo courtesy of Christie’s London

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Carved to resemble a chrysanthemum blossom, this exceptionally delicate white-jade Chinese bowl was made during the Qianlong period. Princess Mary’s husband purchased it in 1923 from the Asian art dealer dealer Yamanaka & Co.

Estimate: $48,000–$80,000

Photo courtesy of Christie’s London

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Christie’s posits that this Qianlong-period celadon-glazed jar has been in the Harewood collection since the early 19th century, when Vulliamy & Son embellished it with ormolu mounts for either the first Earl of Harewood or his heir.

Estimate: $32,000–$48,000

Photo courtesy of Christie’s London

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Fashioned in 1776 by English silversmiths John Wakelin and William Taylor, this covered tureen, standing on a 20th-century wood-and-silver plinth, was presented to Lord Lascelles in 1934, when his horse Blank won the Derby Cup.

Estimate: $6,400–$9,600

Photo courtesy of Christie’s London

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Like her mother, Queen Mary, the Princess Royal was a passionate collector of Chinese objets d’art, especially those made of jade and hard stones. Produced in the early 19th century and measuring nearly 18 inches tall, this pair of artificial grapevines trained over supports are set in cloisonné planters. Materials include gilt bronze, stained bone, amethyst, and green quartz.

Estimate: $24,000–$32,000

Photo courtesy of Christie’s London

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A group of household linens from Harewood House includes a cotton bedsheet embroidered with Princess Mary’s cypher, the initial M surmounted by a crown. Among the other items in this group are a Caucasian carpet and a pair of curtains.